#2843B3#2843B3

#2843B3 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.8% C 0.180 H 267.6°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#2843B3
RGB	rgb(40, 67, 179)
HSL	hsl(228, 63%, 43%)
HSV	hsv(228, 78%, 70%)
CMYK	cmyk(77.7%, 62.6%, 0%, 29.8%)
CIE-LAB	lab(33.39, 30.89, -62.20)
CIE-LCH	lch(33.39, 69.45, 296.41°)
OKLab	oklab(43.77% -0.0076 -0.1799)
OKLCH	oklch(43.77% 0.18 267.6)
XYZ	xyz(11.0161, 7.7189, 43.5484)
Luminance	0.0772 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2843B3 #B39828

analogous

#2889B3 #2843B3 #5228B3

triadic

#2843B3 #B32843 #43B328

tetradic

#2843B3 #B32889 #B39828 #28B352

square

#2843B3 #B32889 #B39828 #28B352

split-complementary

#2843B3 #B35228 #89B328

monochromatic

#121E4F #1D3081 #2843B3 #4360D5 #758AE0

Accessibility & contrast

On white

8.25

#2843B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#2843B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2843B3

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2843B3	#FFFFFF	#000000	##FFFFFF
##2843B3	1.00	8.25	2.54	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #2843b3;
/* rgb */ color: rgb(40, 67, 179);
/* oklch */ color: oklch(43.8% 0.180 267.6);

Tailwind

colors: {
  custom: {
    50: '#7877cb',
    500: '#2843b3',
    950: '#000000',
  },
}

SCSS

$custom: #2843b3;
$custom-light: #7877cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2843b3",
  "rgb": {
    "r": 40,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 228.345,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.4377,
    "c": 0.18003,
    "h": 267.6
  },
  "luminance": 0.0772
}

Semantic roles & 50–950 ramp

primary

#2843B3

secondary

#C8B66F

accent

#C641E6

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2843B3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →